void send_keyboard_command(unsigned char command)
{
//  EIMSK &= ~(1 << INT0);          // Disable clock interrupts

    PORTD &= ~(1 << PIND2);         // Bring CLK low
    _delay_us(300);             // Waaaait for it...

    /* The start bit, always clear */
    PORTD &= ~(1 << PIND3);         // Bring DATA low
    PORTD |= (1 << PIND2);          // Pull CLK high again
    while(bit_is_set(PIND, KBD_CLOCK_PIN)); // Wait for keyboard to bring CLK low

    unsigned char i;
    unsigned char parity = 1;


    for(i = 0; i < 8; i++)
    {
        /* Output bit on DATA line */
        if((command & 0x01) != 0)
            PORTD |= (1 << PIND3);  // Data bit is set
        else
            PORTD &= ~(1 << PIND3); // Data bit is cleared

        while(bit_is_clear(PIND, KBD_CLOCK_PIN));   // Wait for CLK to be set
        while(bit_is_set(PIND, KBD_CLOCK_PIN));     // Wait for CLK to be clear

        parity = parity ^ (command & 0x01);

        command >>= 1;
    }

    /* Parity bit */
    if(parity == 0)
        PORTD &= ~(1 << PIND3);
    else
        PORTD |= (1 << PIND3);

    while(bit_is_clear(PIND, KBD_CLOCK_PIN));   // Wait for CLK to be set
    while(bit_is_set(PIND, KBD_CLOCK_PIN));     // Wait for CLK to be clear

    /* Stop bit - always set */
    PORTD |= (1 << PIND3);
    while(bit_is_set(PIND, KBD_CLOCK_PIN)); // Wait for CLK to be clear

    // Wait for keyboard-send-to-host mode
    while((bit_is_clear(PIND, KBD_CLOCK_PIN)) || ((bit_is_clear(PIND, PIND3))));

//  EIMSK = 1 << INT0;                      // Re-enable clock interrupts
}